Universal, trimmer line, hook disk system

ABSTRACT

A trimmer line, hook disk system in the form of a line trimmer head (e.g. FIGS.  11  &amp;  11 A) as a replacement for attaching to a powered, rotational device to provide a line filament grass cutting action, which trimmer head includes a circular, protective base or bottom (D 2 ), a circular, main trimmer head substrate (D 3 ), the two forming a disk shape, and a series of peripherally spaced line holders; with these three basic elements attached together with appropriate fasteners for ultimate attachment to a powered device. Eleven exemplary line holders are shown in FIGS.  1 - 10 B, respectively, with some allowing oscillating (O) motion in their attachment to the trimmer head substrate (D 3 ) and/or fixed (F) in their attachment. A “broom” embodiment is shown in FIG.  18.  When in use, flexible line made, for example, of nylon, is inserted in and held by the line holders preferably using hook or hook-like line attachments.

RELATED PATENTS

This application relates to some of the same subject matter as the inventor's prior U.S. Pat. No. 5,491,963, issued Feb. 20, 1996, entitled “Garden Cleaning Implement for Cutting/Macerating Weeds Above & Below the Ground;” U.S. Pat. No. 5,651,418, issued Jul. 29, 1997, entitled “Convertible, User-Supported, Garden Cleaning Implement For Cutting/Macerating Weeds and Like;” and U.S. Pat. No. 6,247,539 issued on Jun. 19, 2001, entitled “Cultivator Implement with Castellated Cultivating Protrusions and Multi-Implement, Powered, Cultivation System,” the disclosures of which are incorporated herein by reference for general background information. However, it should be understood that the present invention is directed to a different and completely independent invention than those of the above prior patents.

TECHNICAL FIELD

The present invention relates to weed trimming and grass cutting using flexible line, such as, for example, nylon line, which is rotated at relatively high speed. It eliminates the spool and “bump ‘n’ feed” method of weed trimming of the prior art. Instead it uses a base carrying a series of spaced, line holders on the base having easy means of inserting, holding and/or removing multiple trimmer lines, with the line holders connections to the base either allowing some oscillatory motion of the holders with respect to the base or may be fixed to the base. The base, which preferably is circular, serves as a shield or protector of the proximal portions of the line and its respective holders during use. The line holders preferably use a hook or hook-like structure into which each line, after being folded in half, is insert into and held by the hook or hook-like structure. This over-all structure forms a trimmer head which is attached to a powered device which causes the trimmer head to rotate at relatively high speeds.

The present invention thus relates to, for example, a hand-held, powered tool either with a very long handle or of a compact, hand-gun-like design or the like, for doing various chores, mostly garden-related, generally characterized in the long handled version as a “Weed-Eater” type of device, or alternatively to a wheeled type, powered device in which the user walks behind.

The present invention also relates to a powered, user-two-hand-held, long handle, garden trimming device or unit which is used to remove weeds and the like out of, for example, a garden. The principles of the present invention can also be adapted to be form a “broom” or de-thatcher or the like.

BACKGROUND ART

The following is a list of patents which may be of interest for general background information: Patent No. Inventor(s) Issue Date 3,129,771 Lidstone 21 Apr. 1964 4,242,794 Peterson 06 Jan. 1981 4,286,675 Tuggle 01 Sep. 1981 4,501,332 Straayer 26 Feb. 1985 4,856,194 Lee 15 Aug. 1989 4,862,682 Wait et al 05 Sep. 1989 5,092,112 Buckendorf, Jr. 03 Mar. 1992 5,303,476 Tuggle 19 Apr. 1994 5,345,788 Jerry 13 Sep. 1994 5,361,570 Bernardy 08 Nov. 1994 5,426,852 Macomber 27 Jun. 1995 5,430,943 Lee 11 Jul. 1995 5,489,889 Kambourisetal 06 Feb. 1996 5,491,963 Jerez 20 Feb. 1996 5,493,783 Oostendorp 27 Feb. 1996 5,615,543 Caffey, et al 01 Apr. 1197 5,617,636 Taggert, et al 08 Apr. 1997 5,622,035 Kondo, et al 22 Apr. 1997 5,651,418 Jerez 29 Jul. 1997 5,722,172 Walden 03 Mar. 1998 5,761,892 Quiroga 09 Jun. 1998 5,881,464 Collins et al 16 Mar. 1999 6,038,842 Quiroga 21 Mar. 2000 6,247,539 Jerez 19 Jun. 2001 6,457,242 Fogle 01 Oct. 2002 6,519,857 Proulxetal 18 Feb. 2003 6,594,907 Wilson et al 22 Jul. 2003 6,643,938 Livingston 11 Nov. 2003 6,722,040 Sullivan 20 Apr. 2004

However, in this relatively “crowded” art, there are substantial, innovative, “unobvious” differences between the present invention and the prior art, as brought out more fully below. It is believed that the present invention represents an innovative, substantial advance in the prior art and a valuable contribution to the “useful arts.”

GENERAL SUMMARY DISCUSSION OF INVENTION

As previously noted, the present invention weed trimming and grass cutting using flexible line, such as, for example, nylon line, which is rotated at relatively high speed. It eliminates the spool and “bump ‘n’ feed” method of weed trimming of the prior art. Instead it uses a base carrying a series of spaced, line holders on the base having easy means of inserting, holding and/or removing multiple trimmer lines, with the line holders connections to the base either allowing some oscillatory motion of the holders with respect to the base or may be fixed to the base. The base, which preferably is circular, serves as a shield or protector of the proximal portions of the line and its respective holders during use. The line holders preferably use a hook or hook-like structure into which each line, after being folded in half, is insert into and held by the hook or hook-like structure. This over-all structure forms a trimmer head which is attached to a powered device which causes the trimmer head to rotate at relatively high speeds.

The invention's security nylon restraint elements provide for string security as well as fast and easy nylon or other line insertion.

The special design in the trimmer head, as well as in the security nylon restraint, allows special oscillating motion, if so desired. The user has the option to install security nylon restraint in a fixed mode which will have the same benefits in string security, as well as easy and fast nylon insertion, but with out the oscillatory function, that is, its fixed.

Oscillating motion in string concept of the invention insures that, because of the oscillation motion of the security nylon restraint element, the nylon lines are not subject to the ordinary stresses that conventional weed head attachments are subject to and thus, promotes longer lasting nylon lines or other types of line that might be used in place of nylon line. When contact (with, for example, hard grass, rocks, fences, and other fixed objects, etc.) is made, the flexibility that the oscillating “security nylon restraint” offers; insures that the nylon (or other line), instead of stressing at the point of contact, absorbs the impact and makes like a swooping motion, while cutting, and then returns to the extended, orthogonal or radial position under the action of centrifugal force, when such impeding contact no longer exists.

For example, in connection with the conventional trimmer head, imagine a person holding a broom stick (with little flexibility) extended over his shoulder from end to end and spinning (rotating); the person being the trimmer head and the arms and broom stick being the nylon string. As the person ( head) spins or rotates, the broomstick (string) hits an object (for example, hard grass, fence, etc.) this causes friction and possibly stop or hinder the rotation of the person (head), thus causing broomstick (string) to possibly break off.

In contrast, with the trimmer head of the preferred embodiments of the invention, the person (head) will holds the two, equally cut pieces of broom on each end with the security nylon restraint being the shoulder which will create the line flexibility even if the broom offers no flexibility. When contact is made, the shoulders (security nylon restraint) will absorb with little or no recoil and will be forced to move in the opposite direction of the trimmer rotation.

Also, with the conventional trimmer head of the prior art, the nylon string comes out of an eyelet. When rotating, the nylon string, the string or line tends to be straight out due to the action of centrifugal force, and the flexibility is with the trimmer line only. With this motion (back and forth), it creates friction which thus creates heat and this makes the string vulnerable, brittle, and more prone to breakage.

The preferred embodiments of the present invention have one or more and in some cases all of the following desirable qualities:

-   -   (01) Highest quality component providing longer product life;     -   (02) Provides impact reduction, making the line more resistant;     -   (03) Provides cut in small spaces such as between rocks and         bricks and the like;     -   (04) Clean cuts;     -   (05) Durability for higher impact up to twenty to thirty         (20-30%) percent longer;     -   (06) Easy and longer cutting edger;     -   (07) Flexibility of cutting edger;     -   (08) Outstanding impact toughness;     -   (09) Easy to attach;     -   (10) Cuts in between obstacles;     -   (11) Reduces time and effort;     -   (12) Easy to replace and remove line;     -   (13) More effective;     -   (14) More durable;     -   (15) Re-loading with quickness and ease;     -   (16) Long lasting, super tough trimmer wipe;     -   (17) Change new cutting line in just seconds;     -   (18) Converts standard trimmers into powerful filament line         cutters or trimmers;     -   (19) Can be used on commercial and residential trimmers;     -   (20) Uses practically any line and shape;     -   (21) Outstanding toughness designed or engineered for ultimate         impact resistance;     -   (22) Clean cuts, minimizing or substantially reducing browning         of cut grass tips;     -   (23) No bump, spool, or their resulting tangles;     -   (24) Provides precision edging along sidewalks, curbs, flower         beds, etc.;     -   (25) Perfect head for those who want simplicity;     -   (26) Very simple to feed nylon line into head;     -   (27) Substantially never fails in operation; just feed a piece         of nylon line and keep cutting;     -   (28) No more need to disassemble head and winding spool;     -   (29) Stops constant line breaking as in prior art;     -   (30) Allows use of various size line from, for example, about         0.065″ to about 0.105″;     -   (31) No disassembling; and/or     -   (32) The world's easiest to load string trimmer head.

The foregoing and additional features and approaches of the present invention further are disclosed and discussed below.

BRIEF DESCRIPTION OF DRAWINGS

For a further understanding of the nature and objects of the present invention, reference should be had to the following detailed description, taken in conjunction with the accompanying drawings, in which like elements are given the same or analogous reference numbers and wherein:

FIG. 1 [A1(O/F)] is a perspective view of an exemplary, first embodiment of a line holder which can be used as a component part of the trimmer head of the present invention, with an exemplary trimmer line off to the side showing how it is bent over in half before being hooked into the line holder with anther trimmer line shown actually hooked into the line holder.

FIG. 2 [A2(O/F)] is a perspective view of an exemplary, second embodiment of a line holder which can be used as a component part of the trimmer head of the present invention, likewise with an exemplary trimmer line off to the side showing how it is bent over in half before being hooked into the line holder with anther trimmer line shown actually hooked into the line holder.

FIG. 3 [A3(O/F)] is a perspective view of an exemplary, third embodiment of a line holder which can be used as a component part of the trimmer head of the present invention.

FIG. 4 [B1(O)] is a perspective view of an exemplary, fourth embodiment of a line holder which can be used as a component part of the trimmer head of the present invention.

FIG. 5 [B2(O)] is a plan view of an exemplary, fifth embodiment of a line holder which can be used as a component part of the trimmer head of the present invention.

FIG. 6 [B3(O)] is a perspective view of an exemplary, sixth embodiment of a line holder which can be used as a component part of the trimmer head of the present invention.

FIG. 7 [B4(O)] is perspective view of an exemplary, seventh embodiment of a line holder, which in this embodiment is in the form of a bolt type mechanism that has trimmer line openings on it's head part, which bolt device is inserted to the head on a vertical position.

FIG. 8 [C(O/F)] is a perspective view of an exemplary, eighth embodiment of a line holder, which in this embodiment is in the form of spring/clamp type mechanism with “teeth” to bite down on the trimmer line holding it in position.

FIG. 9 [D(F)] is a perspective view of an exemplary, ninth embodiment of a line holder, which in this embodiment is in the form of a bolt type mechanism that is attached from the outside rim of the trimmer head, which bolt type uses a well know lock nut, washer and security pin (not illustrated).

FIGS. 10A [E(O)] and 10B [E1(O)] are perspective views of exemplary, tenth and eleventh, similar embodiments, respectively, of line holders, which in these embodiments are in the form of mechanisms that selectively may be sandwiched between the elements (D3 and D4) shown in FIGS. 11A & B discussed below, wherein, for example, bent-back nylon line is inserted into the two, exposed holes or four, exposed holes, respectively, which come out of FIGS. 11A & B (D3).

[It is noted that element (D3), described below, illustrates an exemplary main trimmer head member or circular substrate onto which all the previously mentioned line holders can be selectively inserted and attached.]

FIG. 11 (D1) is a perspective view showing an exemplary embodiment of a fully assembled trimmer head with the exemplary line holder of FIG. 4 [B1(O)] being attached to the circular substrate or base members forming a protective disk described more fully below.

FIG. 11A (D2) is an exploded, perspective view of the trimmer head of FIG. 11 showing its elemental parts, including the bottom, protective part that goes underneath the main head substrate or base disk (D3) of FIG. 11; while

FIG. 11B (D2) is an exploded, perspective view of the trimmer head of FIG. 11 showing its elemental parts, including the bottom, protective part that goes underneath the main head substrate or base disk (D3) of FIG. 11 and with an exemplary embodiment of a metal gasket type (D4) that is used to support and/or reinforce the various mechanisms mentioned, it being noted that the support gasket can be placed below the line holders, if so desired.

FIG. 12 [C1(F)] has the same basic function as the embodiment of FIG. 8 [C(O/F)] with the exception that the trimmer head is equipped with two protruding “candy cane” shaped hooks onto which the spring-loaded mechanism is attached or held in place.

FIG. 13 (G1) is a perspective view of an exemplary guard and nylon line protector for use in conjunction with, for example, the mentioned “main trimmer head” (D3, see FIGS. 11A & 11B).

FIG. 14 (G2) is a perspective view of an exemplary guard having basically the same function as the embodiment of FIG. 13 (G1) but different in that the main head (which is attached to a trimmer shaft) is located on top of the guard/line protector apparatus.

FIG. 15 (G3) is a perspective view showing a walk-behind trimmer/mower with the main head (D3) attached and with the guard/line protector of FIG. 14 (G2).

FIG. 16 (G4) shows another example of the guard/line protector in a “universal” mode in which exemplary curved or straight shaft trimmers may be attached.

FIG. 17 (G5) is a perspective view which illustrates another variation which also is “universal” and which is made of exemplary curved metal rods for extra strength, as well as stability to reinforce a, for example, plastic guard.

FIG. 18 is a perspective view of a further exemplary embodiment of the invention which is useful as, for example, a “broom” or de-thatcher, etc. it being noted that, for the purposes of this specification and claims, the term “trim” or “trimmer” and variants thereof generically cover this “broom” embodiment with the “whisks” or sweeping, flexible lines of the “broom” being equivalent to trimmer lines.

In the drawings and descriptions above it also is noted that the letter “O” stands for “Oscillating” and the letter “F” stands for “Fixed.”

EXEMPLARY MODES FOR CARRYING OUT THE INVENTION

The accompanying figures (FIGS. 1-17) show exemplary parts of a total concept which involves trimming and grass cutting as in a conventional weed trimmer apparatus. It works as a fixed or oscillating member of the rotating trimmer head attachment or add-on to a powered device, such as, for example, a “Weed Eater” type of device.

When it is used in the oscillating mode, bolts or pins or other appropriate mechanical elements or devices are used in order to provide or allow this motion. The oscillation motion makes the trimmer line more durable and resists or reduces impact [up to, for example, in the preferred, exemplary embodiment about twenty (20) times longer than a conventional trimmer attachment line] from such fixed items as rocks or bricks, etc. With this trimmer head attachment, overall performance in trimming and edging is achieved. With the oscillating motion concept, the trimmer line will last longer because of the flexibility that it offers. Also, trimmer line replacement is fast and easy due to the typically open, hook or hook-like line attachments used in the exemplary embodiments.

The over-all line trimmer head (D1) is best illustrated assembled in FIG. 11 and in exploded views in FIGS. 11A & B, with the latter adding a metal gasket (D4) for reinforcement. As can be seen, the over-all line trimmer head (D1) includes:

-   -   a circular, protective base or bottom (D2),     -   circular, main trimmer head or body or substrate (D3) and     -   a series of peripherally spaced line holders;         with these three basic elements attached together with         appropriate fasteners, for example, bolts and nuts, and, where         appropriate, washers, and/or screws, all as illustrated. It is         noted that the substrate and the base are circular, forming in         combination a disk like shape having a circular periphery past         which the flexible trimmer lines extend out a number of inches         when attached to the line holders

When in use, flexible line made, for example, of nylon, is inserted in and held by the line holders preferably using hook or hook-like line attachments or holes extending completely through and out its respective line holder.

Thus, each line holder has a series of at least three (preferably five), adjacent, side-by-side, parallel, backwardly extending, hook fingers with the middle one serving as a central member about which bent back, flexible trimming line is inserted with the central crook of the bent back line being wrapped around said central member and with the rest of the line positioned in the spaces formed between the two other, outer, finger members and their respective central member.

Alternatively, the hook or hook-like structures include at least two (preferably four), spaced openings and a central member having a top and is located between the openings into which the flexible trimming line bent back on itself is placed, with the middle or crook of the line being held under the top with its two lengths extending around the central member and completely out through the openings, with the top serving to hold the line down against the central member, trapping it. When the line is rotated at relatively high speeds, centrifugal force forces the line further into its respective hook attachment, strengthening the attachment of the line(s) to the line holder(s).

Preferably at least two such hook attachments are included in each line holder, with a series (e.g., two), peripherally spaced around the combined circular head members (D2 & D3 combined) equally spaced, producing four line extensions at each line holder or a total of eight line extensions. In the embodiments illustrated in FIGS. 11, 11A & B, the two line holders are spaced opposed to one another positioned at, for example, the zero (0°) degree and one hundred and eighty (180°) positions. Additional holes in the main head member (D3) are included at the ninety (90°) degree and three hundred and sixty (360°) degree positions are used for attaching the bottom member (D2) with the upper, main head member (D3) using, for example, screws (not illustrated) or other appropriate fasteners.

Currently the most preferred embodiment is that illustrated in FIGS. 11 & 11A. The following are exemplary, approximate dimensions for this embodiment: overall diameter of head substrate (D3) 4″ diameter of central, raised island 1.5″ length of line holder (front to back) 1.1″ Nylon line length (end to end) 11″ Extension of distal line ends past periphery Several inches+ diameter of central, island opening 0.6″ centerline/axis separation distances (center to holder axis) 1.4″ width of line holder

The materials for the trimmer head members (D2, D3) may be made of plastic or other suitable material, and the material for the line holders likewise can be plastic or metal or other appropriate material.

As indicated above, eleven exemplary line holders are shown in FIGS. 1-10B, respectively. In the embodiments of FIGS. 1 & 2, the hook-like line attachments (two) are provided by a series of five, backwardly projecting, spaced “fingers” with fingers “2” and “4” forming the central members and the spacings between those fingers and the immediately adjacent fingers forming the openings. In the embodiment of FIG. 3 the hook-like attachments are provided by spaced plateaus preferably with curved side walls forming the tops. In the embodiments of FIGS. 4-7 and 10A & 10B, the hook-like attachments are provided by spaced holes, two for each line (two lines being preferred), with the solid material between each pair of holes serving as the central member and the tops of each hole effectively or equivalently providing the top of the hook. The embodiment of FIG. 9 uses a more classically hooked structure for a single line, with the middle “finger” providing the central member.

The line holders are mounted on the main trimmer head (D3) either for free oscillation, i.e., moving back and forth about a “vertically” disposed, central axis under the forces the associated lines may encounter or is fixed, depending on how the line holder is attached to the trimmer head and/or what fasteners are used, or, most preferred, the line holder has the capabilities of both, oscillation and fixed and set with no movement, again depending on how the line holder is attached to the trimmer head and/or what fasteners are used.

The range of oscillation is limited by the sides of the line holder coming into contact with a raised, (e.g., cylindrical), central “island” on the main trimmer head substrate (D3); see FIGS. 11-11B, as the holder swings back and forth. A central opening is located at the very center of the device, which is the center of the “island” which is used to attach the line trimmer head to a powered device by either a bolt or a nut, depending on the end connection of the powered device, as is well known in the art.

Upwardly projecting stops, formed for example, by the sides of the centrally located “island” on the upper side of the substrate which limits the maximum amount of oscillating swing of the line holders, with the maximum amount of oscillating swing allowed being about one hundred and eighty (180°) degrees to and fro or back about ninety (90°) degrees.

The line holder embodiment of FIG. 1 [A1(O/F)] is composed of two parts. One (the top section) has two(2), exemplary hook members to insert the line and the other( bottom section) which has three (3), exemplary hook members to support (or lock) the line with the coordinated benefit of the centrifugal force which pushes the line out. The top section with the two (2) hooks has a large hole (opening) in order to move back and forth for the locking system. This is where the nylon trimmer line, which is bent in half creating a loop, is inserted. The bottom has a round hole in order for the oscillation movement to take place. These two sections are held in place by a male-to-female notch and flange. [It is noted that these two plates or parts can be inverted or switched in position (top to bottom or bottom to top). In this case there is no need to have male/female tracking.]

The line holder embodiment of FIG. 2 [A2(O/F)] includes an exemplary five (5) hook members or fingers extending toward the rear of the line holder. The nylon line is inserted (after being bent back in half forming a “U” shape) with an up/down motion in between the hook members being set or even wedged or inserted evenly loosely into the hook formed by a set of three such fingers.

The line holder embodiment of FIG. 3 [A3(O/F)] has basically the same function as the embodiment of FIG. 1 [A1(O/F), but with the addition of concave teeth to support or bite the trimmer line into place.

The line holder embodiment of FIG. 4 [B1(O)] is used for oscillation. The insertion is be made from the inside/out position, which allows for centrifugal force to have action during rotation. If so desired, flanking bumps can be added where the strings come out for added line protection.

The line holder embodiment of FIG. 5 [B2(O)] provides basically the same function as the embodiment of FIG. 4 [B1(O)] with the exception of the tapered opening which is used to lock the apparatus to a trimmer head attachment that is equipped with a bolt-like hooking mechanism. This part has a “locking pin” or “security pin” on the bigger opening, which insures that this part will stay in place and remain secure while in motion. Nylon trimmer line, for example, can be inserted prior to locking the part onto the head attachment.

The line holder embodiment of FIG. 6 [B3(O)] is basically the same as that of FIG. 5 [B2(O)] with the exception of being attached by the bolt in front of the trimmer line opening as opposed to the back.

The line holder embodiment of FIG. 7 [B4(O)] is a bolt type mechanism that has a trimmer line opening on it's head part. This bolt is inserted into the head in a “vertical” position.

The line holder embodiment of FIG. 8 [C(O/F)] uses a spring/clamp type mechanism with “teeth” to bite down on the trimmer line and hold it in place.

The line holder embodiment of FIG. 9 [D(F)] also illustrates a bolt type mechanism which is attached from the outside rim of the trimmer head (D3). This comes with and uses the well known lock nut, washer and security pin.

The line holder embodiments of FIGS. 10A [E(O)] and 10B [E1(O)] are in the form of mechanisms that selectively may be sandwiched between the elements (D3 and D4) shown in FIGS. 11A & B discussed below, wherein, for example, bent-back nylon line is inserted into the two, exposed holes or four, exposed holes, respectively, which come out of FIGS. 11A & B (D3).

It is noted that FIG. 11 (D1) show a fully assembled, trimmer head (D2, D3) onto which all the previously mentioned apparatus will be inserted and attached, while FIG. 11A (D2) shows in its exploded array the details of the exemplary bottom, protective part or shield (D2) that goes underneath the main trimmer head substrate (D3).

FIG. 11B (D2), which is nearly identical to FIG. 11A, but also shows in its exploded array the details of the exemplary embodiment of an optional, metal gasket type (D4) that is used to support and/or reinforce the various mechanisms mentioned.

FIG. 12 [C1(F)] provides the same basic functionality as the main head trimmer part (D2, D3) of the embodiment of FIG. 11 but is used for mounting the line trimmer embodiment of FIG. 8 [C(O/F)] with the difference that the trimmer head is equipped with two protruding “candy cane” shaped hooks onto which the spring-loaded mechanism is attached and held in place.

With general reference to FIGS. 13-17 and with the nylon guard section of this system, which can be used with the standard weed trimmers, walk behind trimmer mowers, standard push mowers and riding lawn mowers. The function is the same—“to protect cutting members, trimmers line, etc.”

The main function of this protective device is to reduce the total access or exposure of the nylon string; the part which is not necessarily used or needed. Only the outermost or distal part of the string is used. This is due to the special guard/string protector which is attached to the above mentioned. The guard only allows the tip of the string to have access to grass/weed etc.

This action reduces the friction that the exemplary nylon line encounters upon contact with weed, grass, rocks, fences. etc.

The guard also helps to support the weight of string trimmer, walk-behind etc. This is done by having the guard or protector shield rest on the cutting surface. The end part of the guard has debris body protector.

The attachment is good for edging and especially guiding around round edges. With this attachment, it is easy to follow the contour of the ground. This preferably is an adjustable guard that produces the desired height of cut grass, as may be selected by the user.

The protector embodiment of FIG. 13 (G1) provides an exemplary guard and nylon protector. It is used with the mentioned “main trimmer head” (D3). This is, for example, a one piece apparatus with the top portion having, for example, three (3) holes for attaching it to the trimmer system and the bottom section which protects the trimmer line in that it will only expose a certain amount of extended or distal line where the main cutting takes place, while providing protection to the line holder mechanism on which the line is attached or held and the associated, proximal line portions. This protective action reduces the friction and or stress that the line otherwise would incur while also reducing the stress on the trimmer motor.

This is so because only the outer, distal or smaller portion of the line is being used. In contrast, with a conventional trimmer head, all or nearly all of the nylon lines are exposed, thereby creating un-desired stress and friction on the lines as well as on the motor. With this concept, it will help guide in edging and provide better directional control of handheld trimmers. This concept can be used with hand held trimmers [see FIG. 16 (G4)] as well as walk-behind trimmers [see FIG. 15 (G3)] below) and the like. The supplemental protector embodiment of FIG. 13 (G1) is used with the “main head” (D3) and all of it's line attachment mechanisms that are “O/F” in type.

The embodiment of FIG. 14 (G2) has basically the same function as the embodiment of FIG. 13 (G1) but different in that the main head (which is attached to a trimmer shaft) is located on top of the guard/line protector apparatus.

FIG. 15 (G3) shows a walk-behind trimmer/mower with the main head (D3) attached and with the guard/line protector of FIG. 14 (G2).

FIG. 16 (G4) shows another example of the guard/line protector in a universal mode in which curved or straight shaft trimmers may be attached.

FIG. 17 (G5) illustrates another variation which also is “universal” which is made of curved metal rods for extra strength, as well as stability to reinforce a plastic guard.

FIG. 18 is a perspective view of a further exemplary embodiment of the invention which is useable, for example, as a “broom” or de-thatcher, etc.

“Broom” Embodiment (FIG. 18)

A further exemplary embodiment is illustrated in FIG. 18 which can be used in the fashion of, for example, a “broom.” Parallel, longitudinally extended, peripherally located and circumferentially spaced tracks formed in a longitudinally extended, cylinder body are used to hold a side-by-side series of the line holder elements with line hooks which are inserted into the tracks, all as can be seen in the figure. The claws or hooks slide into the tracks and appropriate means are used, for example, an end plate, to hold the hook elements in the track, thus preventing them from coming back out.

This embodiment provides a quick and easy change of the trimmer line which now effectively serve as the whisks, straw, strings or lines of a broom. The direction of rotation also has to go the same way as the hooks or the strings/lines will tend to fall out. The basic concept of this embodiment also can be used as a de-thatcher. It at least generally will not damage turf root system, sprinkler heads, paving stones, concrete, or black top, etc. This embodiment can also be used to remove grass. Two to four tracks or more can be used depending on the driving engine's capacity.

The strings or lines should be balanced out with respect to the tracks to provide relatively smooth, balanced rotation. The hook-like line holding elements should be equally inserted on opposite sides of the tracks for balancing. The distal ends of the claw or hook members inserted on the tracks can be like those illustrated in FIGS. 1, 2, etc., as described above in connection with the various line holder embodiments.

It should be understood that, for the purposes of this specification and claims, the term “trim” or “trimmer” and variants thereof generically cover this “broom” embodiment with the “whisks” or sweeping, flexible lines of the “broom” being equivalent to trimmer lines.

It should be understood that the foregoing dimensions, materials, variations and alternatives, etc., are merely exemplary, and many other changes are possible within the teachings of the present invention.

Thus, it is further noted that the embodiments of the various hook/disk line trimmer head systems illustrated and described herein in detail for exemplary purposes are of course subject to many different variations in structure, design, application and methodology. Because many varying and different embodiments may be made within the scope of the inventive concept(s) herein taught, and because many modifications may be made in the embodiments herein detailed in accordance with the descriptive requirements of the law, it is to be understood that the details herein generally are to be interpreted as illustrative and not in a limiting sense. 

1. For use on a powered device providing rotary power, a flexible trimmer line head add-on comprising: a protective base (D2), a main trimmer head substrate (D3) attached to said protective base on its bottom side and having an upper side, and a series of peripherally spaced, line holders attached to said upper side of said trimmer head substrate, said line holders having a series of hook like line attachments capable of accepting and holding a series of folded-back, flexible, trimming lines in said attachments when said base, said substrate and said line holders, attached together as an integral unit, are attached to and rotated at a relatively high speed by the powered device.
 2. The flexible trimmer line head add-on of claim 1, wherein: said line holders are attached to said substrate by fasteners which allow said line holders to freely oscillate back and forth under the action of centrifugal force and any impeding force any folded-back, flexible, trimming lines may meet when the line head add-on is rotated by the powered device.
 3. The flexible trimmer line head add-on of claim 2, wherein there are further included: upwardly projecting stops on the upper side of said substrate which limit the maximum amount of oscillating swing of said line holders.
 4. The flexible trimmer line head add-on of claim 3, wherein: said maximum amount of oscillating swing is about one hundred and eighty (180°) degrees.
 5. The flexible trimmer line head add-on of claim 1, wherein: said substrate and said base are circular, forming in combination a disk like shape having a circular periphery past which the flexible trimmer lines distally are extendable when attached to said line holders for trimming use.
 6. The flexible trimmer line head add-on of claim 5, wherein: said line holder has a series of at least three, spaced but adjacent, side-by-side, parallel, backwardly extending, hook fingers with the middle one serving as a central member about which a bent back, flexible trimming line is insertable with the central crook of the bent back line being wrapped around said central member and with the rest of the line positionable in the space the two other, outer, finger members and said central members.
 7. The flexible trimmer line head add-on of claim 6, wherein: said line holder has a series of at least five, spaced but adjacent, side-by-side, parallel, backwardly extending, hook fingers with the second and fourth ones each serving as a central member about which a separate bent back, flexible trimming line is insertable with the central crook of the bent beck line being wrapped around its respective one of said central member and with the rest of the line positionable in the spaces the two adjacent, other, finger members, presenting a total of four line segments extending out of the front of said line holder.
 8. The flexible trimmer line head add-on of claim 5, wherein: said line holder has a series of at least two, spaced but adjacent, parallel holes extending from end-to-end completely through said line holder, with the material between said two holes serving as a central member about which a bent back, flexible trimming line is positionable with the central crook of the bent back line being wrappable around said central member and with the rest of the line segments positionable in and extending completely through said openings with the distal ends of the flexible trimming line extending out of and past said line holders and said periphery of said combined base and substrate.
 9. The flexible trimmer line head add-on of claim 8, wherein: said line holder has a series of at least two sets of two, spaced but adjacent, parallel holes extending from end-to-end completely through said line holder, with the material between each of said two holes serving as a central member about which a respective, bent back, flexible trimming line is positionable with the central crook of the bent back line being wrappable around its respective said central member and with the rest of the line segments positionable in and extending completely through said openings with the distal ends of each of the flexible trimming line extending out of and past said line holder and said periphery of said combined base and substrate.
 10. The flexible trimmer line head add-on of claim 1, wherein: said base and said substrate are a single, integral unit in the shape of a longitudinally extended cylindrical body with a series of parallel, longitudinally extended, peripherally located and circumferentially spaced tracks; and said line holder includes a series of side-by-side, hook elements having bases positioned and held within said tracks, said hook elements being capable of holding a series of flexible, trimmer lines within them, said body, with its tracks and hook elements, which when rotated about its center-line and having the flexible, trimmer lines inserted in them, serviceable as a broom like implement.
 11. The flexible trimmer line head add-on of claim 4, wherein there is further included: a protective shield attachable to the trimmer line head add-on which extends laterally out past all of the periphery of said combined base and substrate but short by inches of the distal ends of the flexible trimmer line when present on said line holder.
 12. The flexible trimmer line head add-on of claim 1, wherein there is further included: one or more of the other innovative features disclosed in the foregoing written specification and/or the accompanying drawings.
 13. A flexible line trimming system for cutting grass, weeds and the like, comprising: a powered device providing rotary power at a power end; a flexible trimmer line head add-on attached to the power end of said powered device for rotation, said trimmer line head add-on including: a circular protective base (D2), a circular main trimmer head substrate (D3) attached to said protective base on its bottom side forming a disk shaped structure, and having an upper side, and a series of at least two, peripherally spaced, line holders attached to said upper side of said trimmer head substrate with the attachment allowing said line holders to oscillate back and forth about respective “vertical” axes and located adjacent to the periphery of said trimmer head substrate spaced a hundred and eighty (180°) degrees apart from one another, said line holders having a series of hook like line attachments capable of accepting and holding a series of folded-back, flexible, trimming lines in said line attachments when said base, said substrate and said line holders, attached together as an integral unit, are rotated at a relatively high speed by said powered device, causing trimming lines to move straight, radially out under the action of centrifugal force but allowing the trimming lines to move backwards due to impeding forces causing its respective line holder to oscillate back a limited amount.
 14. The flexible line trimming system of claim 13, wherein: said limited amount of oscillating swing back is about ninety (90°) degrees.
 15. The flexible line trimming system of claim 13, wherein: said disk shaped structure has a circular periphery past which the flexible trimmer lines distally are extended when attached to said line holders for trimming use.
 16. The flexible line trimming system of claim 15, wherein: each of said line holders each has a series of at least three, spaced but adjacent, side-by-side, parallel, backwardly extending, hook fingers with the middle one serving as a central member about which the bent back, flexible trimming line is inserted with the central crook of the bent back line being wrapped around said central member and with the rest of the adjacent line portions positioned in the spaces between said central member and the two other, outer, finger members with said central member extending over its respective flexible line with the distal portions of the line extending past said periphery.
 17. The flexible line trimming system of claim 16, wherein: each of said line holder has a series of at least five, spaced but adjacent, side-by-side, parallel, backwardly extending, hook fingers with the second and fourth ones each serving as a central member about which a separate bent back, flexible trimming line is inserted with the central crook of the bent back line being wrapped around its respective one of said central member and with the rest of the line positioned in the spaces formed between the two adjacent, other, finger members, presenting a total of four line segments extending out of the front of its respective line holder past said periphery.
 18. The flexible line trimming system of claim 15, wherein: each of said line holder has a series of at least two, spaced but adjacent, parallel holes extending from end-to-end completely through its respective line holder, with the material between said two holes serving as a central member about which a bent back, flexible trimming line is positioned with the central crook of the bent back line being wrapped around said central member and with the rest of the line segments positioned in and extending completely through said openings with the distal ends of the flexible trimming line extending out of and past said line holders and said periphery of said combined base and substrate.
 19. The flexible line trimming system of claim 18, wherein: each of said line holder has a series of at least two sets of two, spaced but adjacent, parallel holes extending from end-to-end completely through its respective line holder, with the material between each of said two holes serving as a central member about which a respective, bent back, flexible trimming line is positioned with the central crook of the bent back line being wrapped around its respective said central member and with the rest of the line segments positioned in and extending completely through said openings with the distal ends of each of the flexible trimming line extending out of and past its respective line holder and said periphery of said combined base and substrate.
 20. The flexible line trimming system of claim 13, wherein there is included one or more of the other innovative, “unobvious” features disclosed in the foregoing specification. 